Cassie died in a car accident. She had a crush on Daniel. They were at a party. Daniel got plastered and passed out in his car. Cassie tried to wake Daniel up and for what ever reason she tried to drive him home. She had never really driven outside the ranch and lost control of the car. She did get better for a few days, but she got an infection, she ran away from the hospital to look for Daniel. When they found her she had a high fever and they were unable to treat it fast enough.
Victor has been diagnosed Epilepsy and was not taking was meds. The Epilepsy made him experience some type of spiritual Euphoria. He went off to a Monastery in India and recently came back. He has had some huge mood swings and they happen at a drop of a hat. One minute he is as calm and sweet as can be, the next he is like his old self but madder then a hornet. There is no middle ground. Victor is supposedly taking his meds now but the meds, if, he is really taking them, are making him have some type of psychotic episodes or side effect. The family has not figured out what is happening. The only person that has a clue (Jack) is taking advantage of the situation. I can't help you as far as Heather Thom. I wasn't watching Y&R during that time myself. But I have seen her on the View as one of the hosts a few times. I think she went to another Soap Opera.